I dont understand this error in line 653 and the end goal is to make a graph

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Amil Ali
Amil Ali 2023-4-12
评论： Amil Ali 2023-4-13
Hi Guys hopefully some of you guys can help. im pretty new to Matlab 2020a and do not have much experience.
i have entered the following code into my live script : (i have attached and shorten verision of the Sep_Consibio Cloud Datalog.csv in this question)
%% Raw data plot for Septemper
% Data import
tic
opts = delimitedTextImportOptions("NumVariables", 4);
% Specify range and delimiter
opts.DataLines = [1, Inf];
opts.Delimiter = ",";
% Specify column names and types
opts.VariableNames = ["Timestamp", "Date", "H2SIn", "H2SOut"];
opts.VariableTypes = ["double", "datetime", "double", "double"];
% Specify file level properties
opts.ExtraColumnsRule = "ignore";
opts.EmptyLineRule = "read";
% Specify variable properties
opts = setvaropts(opts, "Date", "InputFormat", "dd/MM-yy HH:mm:ss");
% Import online measurement data from Consibio
ConsibioSepdatalog = readtable("Users\amil\Documents\MATLAB\Rawdata2022\Sep_Consibio Cloud Datalog.csv", opts);
ConsibioSepdatalogTrimNew = ConsibioSepdatalog(:,:);
toc
and get the following Error using matlab.io.ImportOptions/readtable (line 653)
Unable to find or open 'Users\amil\Documents\MATLAB\Rawdata2022\Sep_Consibio Cloud Datalog.csv'. Check the path and filename or file permissions. --> however the document is in the same folder as the live script --> i how give my file permission? I'm an apple user and have a MacBook Air (13-inch, 2017) 8 GB 1600 MHz DDR3, icore 5.
the goal is to use the Rawdata in a plot where the x-axis is time [dd.mm.hh.mm:ss] and y- axis is for the concenctration in and out of H2S [ppm]
  • if you have any suggestion for this part of the code please comment :)

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采纳的回答

Image Analyst
Image Analyst 2023-4-12
Since the file is in the same folder as the m-file, you can do
fullFileName = fullfile(pwd, 'Sep_Consibio Cloud Datalog.csv');
if ~isfile(fullFileName)
errorMessage = sprintf('File not found:\n"%s"\nCheck the spelling.')
uiwait(errordlg(errorMessage));
return;
end
% If you get here, the file exists.
fprintf('Processing "%s".', fullFileName)
ConsibioSepdatalog = readtable(fullFileName, opts);
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Amil Ali
Amil Ali 2023-4-12
Ok thx you - No alert was given of the file not exist. That mean with your code i have imported the file i guess.
Image Analyst
Image Analyst 2023-4-13
Yes. So it must have found it. Since it did, it would have printed it out to the command window. If you want a popup message you can do
fullFileName = fullfile(pwd, 'Sep_Consibio Cloud Datalog.csv');
if ~isfile(fullFileName)
errorMessage = sprintf('File not found:\n"%s"\nCheck the spelling.')
uiwait(errordlg(errorMessage));
return;
end
% If you get here, the file exists.
message = sprintf('Success! Found the file!\nNow processing "%s".', fullFileName);
fprintf('%s\n', message); % Print to command window.
uiwait(helpdlg(message)); % Pop up a dialog box with the same info.
ConsibioSepdatalog = readtable(fullFileName, opts);

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更多回答（2 个）

Alan Stevens
Alan Stevens 2023-4-12
Get rid of the gaps between Consibio and Cloud, and between Cloud and Datalog (In the file name and when calling it).
Walter Roberson
Walter Roberson 2023-4-12
ConsibioSepdatalog = readtable("C:\Users\amil\Documents\MATLAB\Rawdata2022\Sep_Consibio Cloud Datalog.csv", opts);
You omitted the drive and leading \ . When you omit the leading \ then you are asking to look in a directory named Users inside your current folder

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